Puzzle piece



FIG. 1 is a top plan view of a puzzle piece showing my new design, the side opposite being a mirror image thereof;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof; and

FIG. 5 is a right side elevational view thereof. 

The ornamental design of a puzzle piece, as shown and described. 